Spindle-locking mechanism for machine-tools.



A. L. DE LEEUW. SPINDLE LOCKING MECHANISM FOR MACHINE TOOLS. APPLICATIONFILED 0013.4, 1909. 964,764. Patented July 19, 1910.

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A. L. DE LEEUW. SPXIWLE LOGKHJG MECHANISM FOR MACHINE TOOLS. APPLICATIONFILED 0014, 1909. 964,764. Patented July 19, 1910.

UNITED STATES PATENT ennui.-.

ADOLPH L. DE IiEEUW, OF HAMILTON, OHIO, ASSIGNOR TO THE CINCINNATI'iVJIILBL-ZIEG IILACHINE COMPANY, OF CINCINNATI, OHIO, A CORPORATION OFOHIO.

SPINDLE-LOCKING MECHANISM FOR MACHINE-TOOLS.

To all whom it may concern:

Be it known that I, Anonrn L. Dr. Lnnuw, a citizen of the United States,residing at Hamilton, in the county of Butler and State of Ohio, haveinvented certain new and useful Improvenients in Spindle-Locking Mech-.anism for Machine-Tools, of which the following is a specification.

My invention relates to an improvement in means for locking the spindleof a machine tool against rotation for applying or withdrawing variousworking tools, relieving the drivlng mechanism of undue strains fromsuch source.

-The object of my invention is to provide the spindle of a machine tool,or one of the power transmitting elements thereof, with means adapted toengage therewith for locking the same against rotation when the powertransmission mechanism is at rest, together with means for disengagingthelocking means through mechanism controlling said power transmittingmechanism when throwing the power into commission.

The features of the invention are more fully set forth in thedescription of the accompanying drawings, forming a part of thisspecification, in which:

Figure 1 is a sideelevation of a vertical millin machine to which myimprrwement is applied. Fig. 2 is an enlarged section on line w, :12,Fig. 1. Fig. 3 is an enlarged central vertical section through thespindle and head of a milling machine, as illustrated in Fig. 1. Fig. 1-is a section on line w, w,

while I'have illustrated a verti'al type of milling machine, as themachine tool to which my improvement is applied, it is obvious that thesame can he applied to the horizontal type or any other class of machinetoolshaving a revolving spindle for carrying the work holding or cuttingtools.

1 represents the frame of the machine.

2 represents the vertical movable head. 3 represents the spindlejonrnaled therein.

t represents a beveled g'ear having a splined connection with thespindle, for revolving the same, in mesh with a gear 5, fixed on shaft(3, said shaft being suitably journaled in hearings formed in the frame1.

7 represents a gear fixed on shaft (l, in mesh with a gear 8, fixed upona shaft 9,

forming an element of a variable speed sys- Speciflcation of LettersPatent.

Application filed October 4, 1909.

Iatented July it Serial No. seams.

tem, for conveying various speeds to t a by ed upon a rock shaft 12,said rock shaft being suitably journaled in bearings formed in the mainframe 1. The locking men'iher is preferably elongated in form, adaptedto engage the edge face of the bearings 13, carrying the rock-shaft 12,so as to prevent lateral movement of the. locking member, when engagedwith. the lugs of the gear 8, and this enga ement is preferably formedby providing the lock plate.,11, with a notch between which one of thelu s 10 engages.

l t represents a lever fixed to the reel: Zhaft 12, for manipulating thelocltingmem- 15 represents a lever for controlling clutch methanism tothrow on and oil the power to the spindle. As illustrated, the lever 15is in engagement with a clutch actuating rod 17, horizontally rejectedthrough a hollow main driving s aft, upon which the puhey 18 looselyjournals. The rod 16 is m ponnection with clutch shifting mechanism, notshown, for moving the clutch memher 19 into frictional engagementwith.the pulley 18, said pulley shaft being in driving connection throu hintermediate gearing not shown, with s wit 9. It is obvious, however,that the lever 15 may control clutch mechanism of any design forcontrolling the transmission of power to shaft 9. This lever is soarranged, that in its patlt of movement. to throw in the drivingn.cchanism, it will engage a projecting boss 16, of the lever 14, todisengage the locking member from the gear, prior to completing themovement of the lever 15, throwing in the power, to insure that the gear8 is free from its engagement with the locking mechanism, and further,prevents a locking of this gear as long as the power remains ioo . lingthe drivin position, as is the case in a horizontal milling machine,without departing from the features of my invention.

It is very desirable in machines of this class to lock the spindleagainst rotation at a point between the spindle and transmissionelements therefor, where working tools, face plates, chucks, etc., aredirectly applied upon the spindle, to relieve the transmitting elementsof spindle strains, thus saving the breakage of teeth of thetransmission gearing, and affording plied to the tool W mg the same fromthe spindle.

Having described my invention, I claim:

1. In a machine of the class described, a rotary spindle, rotary drivingmechanism having a wheel formed with a member to be looked, arock-shaft, a locking member thereon, ada ted to be moved into and outof the ath or the member to be locked to inter ock therewith, and ahandle for nianipulating the rock shaft, a clutch controlor mechanism,and a handle for operating the same, said handles being relativelypositioned and movable, so that the movement to engage the clutchreleases the lock.

2. In a machine of the class described, a frame, a rotary spindle androtary driving mechanism mounted in hearings in the frame, one of therotary driving elements being formed with a member to be looked, a rockshaft having bearings in the frame, and arranged transversely relativeto the member to be locked, a swinging locking member on said rock shaftoccupying a position begreat pressure to be ap-' en inserting or remov-.tween the bearings thereof, and adapted to be moved into and out of thepath of move- I ment of. the member to be locked, so as to interlocktherewith, a handle for manipulatin the rock shaft, a clutch controllingthe riving mechanism, and a handle for operating the same, said handlesbeing relatively positioned and movable, so that the iDOfKIQIHGDt toengage the clutch releases the 3. In a machine of the class described, arotary spindle, and rotary driving mechanism, a clutch for controllingthe driving mechanism, a handle for manipulating the clutch, one of therotary driving elements being formed with a member to be locked, driventhrough the clutch, a rock shaft arranged transversely relative to themember to be locked, a locking member on the rock .shaft adapted to bemoved into and out of the path of movement of the member to be locked,so as to interlock therewith, an a handle for locking said shaft, thehandle for manipulating the lockin member 00- cupying a position whentie spindle, is locked, in the path of movement of the handle forcontrolling -the clutch, when it is set in position for disengaging theclutch, whereby the movement of the handle to throw in the clutchautomatically disengages the lock.

In testimony whereof, I have hereunto set my hand.

ADOLPH L. DE LEEUW. Witnesses: 3

OLIVER B. KAISER, EMMA SPENER.

